KF36 - Check GND Circuit to ACPSW

- Key "ON", engine "OFF".

- AC Pressure Switch (ACPSW) disconnected.

- Connect jumper wire between the High Fan Control (HFC) circuit at the ACPSW vehicle harness connector and the battery negative post.

- Does the high speed fan come on now?

Yes -- Key "OFF". Service open GND circuit to the ACPSW. Remove jumper wire and Reconnect ACPSW. Re-evaluate symptom.

No -- Key "OFF". Service open HFC circuit between the ACPSW and splice. Remove jumper wire and reconnect ACPSW. Re-evaluate symptom.